Log in to your Bet365 account and select the 'Sports' tab. Select the markets of your choice and add them to your bet slip. Make sure you have at least three selections, as this is the minimum required for an accumulator bet. Once you have added all your selections to your bet slip, select the 'Accumulator' option.

Address Line 1 on Bet365 or any other online registration form typically refers to the first part of your address where you should enter the primary or most specific information about your physical location.